Motorola EXORciser M6800 System

[Pete Lancashire]

Total congratulations

On Tue, Jun 5, 2018, 2:10 PM Thomas B via cctech <cctech at classiccmp.org>
wrote:

> Since a few days, my EXORciser Development System is finally able to boot
> from floppy diskettes.
>
> Previous attempts have shown that the Motorola EXORciser M68SFDC1 floppy
> disk board used has a special modified ROM version. This was probably
> written for an 8-inch drive, in which the Write protect and Direction
> signal were inverted.
> For the sake of simplicity, I have used free inverter on the board to
> invert the signals accordingly.
> After adjusting the PLL frequency, reads and writes from the card are now
> error-free. And all without FDC, only clever programming by Motorola
> software engineers in the early 76’
>
> Originally, the EXORdisk system was a dual drive with two 8 "units. This I
> have replaced with a double drive of two 5.25 inch units. An Epson and a
> TEAC, which can be jumpered to 360 rpm. Luckily, 2HD floppy disks are easy
> to R&W.
> I also got a GOTEK floppy emulator running, which I can boot from. Thanks
> to Roland Huisman, Bitsaver has some interesting floppy disks that convert
> to HFE format work perfectly. This format makes the Gotek drive most
> reliable.
>
> Now to my question. The vintage computer forum at
> http://www.vcfed.org/forum/archive/index.php/t-44638.html mentioned some
> interesting manuals. Archive.org has some manuals, Bitsaver does not have
> manuals about the M6800 development system.
> If someone already owns scanned manuals to the following list
>
> M6800 Basic Interpreter Reference Manual
> M6800 Macro Assembler reference Manual
> M68SFDU Exordisk 11/111 Disk `Drive Unit Maintenance Manual
> M6800 Exorciser 11 User's Guide
> M6800 Exorciser User's Guide
> MEX68PP1 PROM Programmer Module Supplement M6800 Exorciser User's Guide
>
> I would welcome any feedback or questions
>
> --THOMAS
>
>